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| 型号： | A6267KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/17页 |
| 文件大小： | 0K |
| 描述： | IC LED CTLR AUTO HI CURR 16TSSOP |
| 标准包装： | 8,000 |
| 恒定电流： | 是 |
| 拓扑： | 低端，PWM，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，背光 |
| 频率： | 100kHz ~ 700kHz |
| 电源电压： | 6.5 V ~ 50 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 150°C |
A6267
Automotive High Current LED Controller
ELECTRICAL CHARACTERISTICS 1 (continued) Valid at T J = –40°C to 150°C, V IN = 8 to 40 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Oscillator (continued)
OSC Input Hysteresis
V Oihys
300
600
–
mV
OSC Watchdog Period
CKOUT Output High Voltage
CKOUT Output Low Voltage
t OSWD
V COH
V COL
Between successive rising edges
I OH = –1 mA
I OL = 1 mA
7
V REG – 1
–
–
–
–
–
V REG
0.4
μ s
V
V
LED Current Sense
Input Bias Current LN (BB mode) 4
I LN
LP = LN = VIN
–
6
–
μ A
Input Bias Current LP (BB
mode) 4
I LP
LP = LN = VIN
–
220
–
μ A
Input Bias Current LN (B mode) 4
I LN
LP = LN = 0 V
–
–2
–
μ A
Input Bias Current LP (B
mode) 4
I LP
LP = LN = 0 V
–
–25
–
μ A
Differential Input Voltage (Active)
Input Common-Mode Range (BB mode) 4
Input Common-Mode Range (B mode) 4
Current Error
V IDL
V CMLH
V CMLL
E ISL
EN = High, V IDL = V LP – V LN
V LP = V LN
V LP = V LN
[(10 × I LED × R SL ) – 1] × 100
–
V IN
0
–5
100
–
–
–
–
V IN + 1
1
5
mV
V
V
%
Switch Current Sense
Input Bias Current
Maximum Differential Input Voltage 3
Input Source Current
Input Common-Mode Range
I BIASS
V IDS
I INS
V CMS
SP = SN = 0 to 2 V
V IDS = V SP – V SN with D = 50%
V IDS = 120 mV
V SP = V SN
–30
110
–
0
–
145
120
–
–
180
–
2
μ A
mV
μ A
V
Diagnostics and Protection
Fault Blank Timer 5
VREG Undervoltage Turn-Off
VREG Undervoltage Hysteresis
LED String Short Voltage
Non-Reference LED Short Offset
Voltage
Reference LED Short Offset Voltage
LED Open Voltage
LF Bias Current (BB mode) 4
LA Bias Current (BB mode) 4
LF Bias Current (B mode) 4
t FB
V REGUV
V REGUVhys
V SCL
V SCO
V SCOR
V OCL
I LF
I LA
I LF
Start-up
Decreasing V REG
LF = LA = VIN + 1.7 V
LF = LA = VIN + 1.7 V
LF = 1.7 V
–
4.1
130
430
160
430
5
–
–
–
3
4.3
150
505
200
505
5.5
46
170
8
–
4.5
160
580
240
580
6
–
–
–
ms
V
mV
mV
mV
mV
V
μ A
μ A
μ A
LA Bias Current (B
mode) 4
I LA
LA = 1.7 V
–
34
–
μ A
LED Undercurrent Voltage Difference 6
V UCL
–
1
–
mV
Open Fault Time-Out
Overtemperature Warning Threshold
Overtemperature Hysteresis
t OTO
T JF
T Jhys
f OSC = 350 kHz
Temperature increasing
Recovery = T JF – T Jhys
–
–
–
94
170
15
–
–
–
ms
oC
oC
1 For
input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
2 Function is correct but parameters are not guaranteed below the general limit (8 V).
3 Parameters ensured by design.
4 BB mode = buck-boost (supply-referenced) mode, B mode = boost (ground-referenced) mode.
5 Fault Blank timer not enabled for open-LED condition.
6 Undercurrent when V
SENSEL < V IDL – V UCL , where V SENSEL is the voltage across the LED current sense resistor R SL .
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
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